DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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Ok.. I've f**ked up.. I've tried to copy the contents of one SPI chip to another but thankfully I backed both up before starting.
I've got a dash-board with an LCD fault and the replacement one requires programming at a main-dealer so I thought I'd be clever and flash a copy of the SPI memory between the two which has EPICALLY failed  ..
The IC in question is a "Microchip 25LC640" and I've been using an in-circuit programming clip with a CH341A programmer..
I've read the original data just fine and I can blank the chip but when I try and flash contents back it jus simply writes garbage and it wont verify..
WTF am I doing wrong? I know CS has its fair share of geeks and I'm hoping someone can help me salvage this situation 
[Edited on 30-10-2014 by DaveyLC]
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Ian
Site Administrator
Registered: 28th Aug 99
Location: Liverpool
User status: Offline
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LCD "fault"
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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As in only half of the pixels (on a good day) on the LCD display work.. Don't worry I'm not faffing with mileage 
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DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
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Turns out its a 64kbit SPI EEPROM not a 64mbit one.. Woopsie..
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Ian
Site Administrator
Registered: 28th Aug 99
Location: Liverpool
User status: Offline
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Yeah that's what I was thinking 
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